Evaluation of interface and cohesion shear strength of mechanical lap-joint between HTS coated conductors intended for segmented HTS magnet

Luis E.F. Aparicio, Satoshi Ito, Hidetoshi Hashizume

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

This study evaluates the mechanical strength, failure mechanism and change in electrical resistance under shear stress of a mechanical lap joint of Rare-Earth Barium Copper Oxide high-temperature superconducting (HTS) tapes using indium as bonding material, which has been proposed for "remountable" (demountable) or segmented HTS magnet in future fusion reactors. Results from tensile shear tests using reinforced REBCO tapes along with an analysis on the failure mode demonstrated that contact conductivity is the critical parameter that defines joint's shear strength rather than joint pressure. Additionally, it was concluded that change in joint resistance when failure occur is not abrupt and its behavior as joint displaces depends on the failure mode of the joint.

Original languageEnglish
Pages (from-to)789-795
Number of pages7
JournalFusion Science and Technology
Volume72
Issue number4
DOIs
Publication statusPublished - 2017 Nov

Keywords

  • High-temperature superconductor
  • Mechanical lap joint
  • Segmented magnet
  • Superconducting magnet

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering

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